This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A051725 #7 Aug 29 2018 14:52:30 %S A051725 1,12,6,4,3,12,2,12,3,4,6,12,1,12,6,4,3,12,2,12,3,4,6,12,1,12,6,4,3, %T A051725 12,2,12,3,4,6,12,1,12,6,4,3,12,2,12,3,4,6,12,1,12,6,4,3,12,2,12,3,4, %U A051725 6,12,1,12,6,4,3,12,2,12,3,4,6,12,1,12,6,4,3,12,2,12,3 %N A051725 Denominator of n/12. %C A051725 Arises in the equal-tempered musical scale - see Goldstein (1977), Table 1. - _N. J. A. Sloane_, Aug 29 2018 %D A051725 Goldstein, A. A. "Optimal temperament." SIAM Review 19.3 (1977): 554-562. %D A051725 R. L. Graham, D. E. Knuth and O. Patashnik, Concrete Mathematics. Addison-Wesley, Reading, MA, 1990, p. 269. %Y A051725 Cf. A051723. %K A051725 nonn,easy,frac %O A051725 0,2 %A A051725 _N. J. A. Sloane_